Over the last few years, there have been some infamous incidents of airports being shut down and flights grounded because a camera drone was spotted nearby. But these accidents have given a group of climate activists an idea: in two weeks, they plan to fly drones inside London Heathrow’s no-fly zone as a “symbolic action,” possibly shutting down the world’s 7th largest airport. The group is called “Heathrow Pause,” and on September 13th, at least four drone pilots are planning…